If you're looking to make your Ram 1500 TRX sound even more like a monster, a trx cold air intake is usually the first thing people look at. It's one of those classic "Day 1" mods that almost everyone considers the moment they pull that 702-horsepower beast into their driveway. But let's be real for a second—the TRX isn't exactly a slow truck. It's already a supercharged titan that eats Ferraris for breakfast at stoplights. So, does adding an intake actually do anything, or is it just expensive engine bay jewelry?
The truth is somewhere in the middle, and it really depends on what you're trying to get out of your truck. If you're expecting to bolt on 50 horsepower and suddenly start flying, you might be disappointed. But if you want that Hellcat engine to scream and feel a bit more responsive when you mash the pedal, then we need to talk about what's actually happening under that massive hood scoop.
Why the Stock Airbox Isn't Always Enough
To give credit where it's due, Ram didn't just slap a cheap plastic tube on the TRX and call it a day. The stock induction system is actually pretty impressive. It's designed to pull in massive amounts of air through that functional hood scoop while keeping out dirt, water, and debris. This is important because the TRX is meant to fly through the desert, not just sit in a parking lot.
However, factory setups always have to prioritize things that enthusiasts don't necessarily care about. They have to worry about "NVH"—noise, vibration, and harshness. They want the truck to be quiet enough for a daily commute. They also have to build the airbox to be cost-effective and easy to service for a technician.
When you swap to an aftermarket trx cold air intake, you're essentially removing those factory "mufflers." Most stock airboxes have baffles and resonators designed to cancel out the very sounds we love. By opening up the airway with a smoother, larger tube and a high-flow filter, you're letting the 6.2-liter Hemi breathe the way it was always meant to.
That Supercharger Whine
Let's not beat around the bush: the main reason most of us want a trx cold air intake is the sound. There is nothing quite like the sound of a twin-screw supercharger sucking in air. In the stock configuration, you can hear it, sure, but it's a bit muffled. It's like listening to a concert from the parking lot.
The moment you install an open-element intake, that whine becomes front and center. It's addictive. You'll find yourself rolling down the windows just to hear the whistle every time you give it even a tiny bit of throttle. For a lot of owners, that sound alone justifies the price tag. It transforms the driving experience, making the truck feel more aggressive even when you aren't doing 100 mph across a dry lake bed.
Does It Actually Add Power?
This is the million-dollar question. If you look at the marketing materials for various intake kits, you'll see claims of 15, 20, or even 30 horsepower gains. Are those numbers real?
Well, yes and no. On a dyno, in a controlled environment with the hood open and a massive fan blowing air, you might see those gains. In the real world, the difference in "butt dyno" feel is usually pretty subtle. Where you'll notice it most is in the throttle response. Because the aftermarket intake is less restrictive, the engine doesn't have to work as hard to pull in air when you suddenly floor it. That "lag" or "hesitation" feels significantly reduced.
It's also worth noting that the TRX is a smart machine. The ECU (the truck's brain) is constantly monitoring air-to-fuel ratios. To get the absolute most out of a trx cold air intake, most people eventually pair it with a tune, though that's a whole different rabbit hole involving warranties and expensive computer flashes. But even without a tune, the increased airflow helps the supercharger stay efficient, especially in warmer weather.
Open vs. Closed Box Designs
When you start shopping for a trx cold air intake, you'll notice two main styles: open-box and closed-box. This is where you have to think about how you actually use your truck.
The Open-Box Style
These setups usually have a heat shield but the top of the filter is relatively exposed to the engine bay. These are the kings of sound. If you want the loudest supercharger whine possible, this is the way to go. The downside? They can be more prone to "heat soak" if you're sitting in traffic, as they might pull in some of the hot air from the engine compartment.
The Closed-Box Style
Companies like S&B or aFe often make fully enclosed boxes that mimic the factory setup but with much larger internal volume and better filters. These are generally better for keeping intake temperatures low, which is crucial for maintaining power during long drives or off-roading. They are also better at protecting the filter from mud and water if you're actually taking your TRX into the dirt. They're still louder than stock, but usually a bit more muffled than the open-box versions.
The Dry vs. Oiled Filter Debate
Another thing you'll have to choose is the type of filter media. You've probably heard people arguing about this on forums for years.
Oiled filters (like the classic K&N style) generally offer the highest airflow. The oil traps the dirt. The catch? If you over-oil them after cleaning, that oil can get sucked onto your Mass Air Flow (MAF) sensor and cause all sorts of headaches.
Dry filters are becoming much more popular for the TRX. They are "set it and forget it" until they get dirty, at which point you just blow them out or replace them. They might flow slightly less than an oiled filter, but the peace of mind and ease of maintenance make them a favorite for many truck owners.
Is It an Easy DIY Project?
One of the best things about a trx cold air intake is that you don't need to be a professional mechanic to install one. If you can handle a socket wrench and a screwdriver, you can probably get this done in about an hour in your driveway.
Most kits are designed to be "bolt-on," meaning you don't have to cut or drill anything. You just remove the factory plastic, swap over a few sensors, and bolt the new hotness into place. It's a great "gateway mod" for people who want to start working on their own trucks but aren't ready to tear into the engine internals.
Wrapping It Up
So, at the end of the day, should you buy a trx cold air intake?
If you're looking for a massive jump in horsepower that you can feel in your soul, you might want to look at pulleys or porting the blower instead. But if you want to unlock that glorious Hellcat sound, sharpen up your throttle response, and give your engine bay a much cleaner look, it's one of the best upgrades you can do.
The TRX is a ridiculous, over-the-top machine. It deserves to sound as fast as it looks. Adding a high-quality intake is just the finishing touch that the factory was too shy to give it. Just be prepared: once you hear that supercharger scream for the first time, you'll never want to drive a quiet truck again. Your fuel economy might take a hit, too—not because the intake is inefficient, but because you won't be able to stop yourself from hitting the gas just to hear it.